Molecular divergence patterns and infrageneric relationship of Monoclea (Monocleales, Hepaticae). Studies in austral temperate rain forest bryophytes

Meißner, Kathrin; Frahm, Jan‐Peter; Stech, Michael; Frey, Wolfgang

doi:10.1127/nova.hedwigia/67/1998/289

Cited by 28 publications

(11 citation statements)

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“…However, this viewpoint is not supported by the present study. Monoclea is nested among the species of the Marchantiales, and is a derived taxon, as also corroborated by Meißner et al. (1998) based on trn L‐F sequence data.…”

Section: Discussionsupporting

confidence: 68%

Illuminating the evolutionary history of liverworts (Marchantiophyta)—towards a natural classification

et al. 2006

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The phylogenetic relationships of liverworts were reconstructed using the sequence data of four genome regions including rbcL, rps4 and trnL-F of the chloroplast and 26S large subunit ribosomal rRNA gene of the nucleus, and 90 characters of morphological, ultrastructural and developmental aspects. The taxa sampled consisted of 159 species including 135 liverworts (108 genera, 54 families and 29 suborders), 13 mosses, two hornworts, seven vascular plants and two charophyte algae. Analyses based on maximum parsimony using both direct optimization (POY) and static alignment (NONA), as well as Bayesian inference (MrBayes) were done. All the data sets were analyzed simultaneously. Our study confirms that liverworts compose a monophyletic group which consists of three classes. The class Treubiopsida including both Treubia and Haplomitrium is resolved as the earliest diverging liverwort lineage. Blasia and the complex thalloids are assigned to the Marchantiopsida, under which Blasiidae and Marchantiidae are divided. Marchantiidae include Sphaerocarpales and Marchantiales. The simple thalloid and leafy liverworts form the Jungermanniopsida, which is further divided to subclasses Pelliidae subclassis nov., Metzgeriidae and Jungermanniidae. Metzgeriidae here is defined to include only Metzgeriaceae, Aneuraceae and Vandiemeniaceae, and is the sister group to the leafy liverworts. The leafy liverworts Jungermanniidae include the orders Pleuroziales, Porellales and Jungermanniales. It is assumed that the Porellales and the Jungermanniales have split early, at least in the Jurassic period. In the Porellales, the diversification rate may have remained relatively constant for long periods of time but speeding up only recently within some of the families, associated with an explosive radiation of angiosperms. The Jungermanniales are most probably a recently diversified group which has attained the greatest profusion of structure and the most remarkable diversity of leaf development and protective devices for maturing sporophytes. A detailed classification scheme for liverworts is presented.

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Section: Discussionsupporting

confidence: 68%

Illuminating the evolutionary history of liverworts (Marchantiophyta)—towards a natural classification

et al. 2006

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“…The H. flabellatum specimens show slight sequence differences but these are not significant. The substitution rate of 0-0.9% is relatively low and similar to the rates obtained for specimens of Monocleaforsteri from New Zealand (0.3%, Meibner et al 1998) and Lopidium concinnum from New Zealand and South America (0.33%, Frey et al 1999). This high level of genetic similarity does not allow conclusions concerning regionally distributed genetic divergence patterns.…”

Section: Discussionsupporting

confidence: 80%

Molecular relationship ofHymenophytonspecies (Metzgeriidae, Hepaticophytina) in New Zealand and Tasmania. Studies in austral temperate rain forest bryophytes 5

Pfeiffer

2000

New Zealand Journal of Botany

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The infrageneric relationship in Hymenophyton is studied based on a sequencing of the trnL UAA intron of chloroplast DNA of New Zealand and Tasmanian specimens-The molecular data strongly support the existence of at least two species, including H.flabellatum and H. leptopodum. These species, already recognised as distinct in phytochemical studies, but nevertheless often regarded as synonyms due to morphological similarities, are readily identified by the differences in the analysed intron sequences. Two indels and at least six substitutions differentiate between specimens of H. flabellatum and H. leptopodum. Within H. flabellatum and within New Zealand H. leptopodum, the homologies in the sequence of the trnL intron are great (>99%) and no molecular divergence patterns can be detected. Possible intraspecific relationships between the analysed specimens of both taxa are discussed.

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“…2002), and are probably common among bacteria and single‐celled eukaryotes (Guttman & Dykhuizen 1994; Brown & Hovmøller 2002; Findlay 2002). In mosses, recent floristic and phylogenetic studies indicate that in many cases broad distributions may result not from ancient vicariance but from dispersal among suitable habitat sites (Van Zanten 1978; McDaniel & Shaw 2003; but see Meißner et al . 1998).…”

Section: Discussionmentioning

confidence: 99%

Selective sweeps and intercontinental migration in the cosmopolitan moss Ceratodon purpureus (Hedw.) Brid.

McDaniel

Shaw

2005

Molecular Ecology

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The moss Ceratodon purpureus has long been used as a model system in plant development and physiology. However, the molecular population genetics of the species remains virtually unexplored. In this study, we used population genetic analyses of DNA sequence data from three unlinked loci (atpB-rbcL spacer, adk, and phy2) to examine biogeographical patterns in a global sample of this species. The three loci differed significantly in mutation frequency spectra and implied population structure. Pairs of haplotypes from single populations were frequently more divergent than haplotypes sampled from widely disjunct populations. In the atpB-rbcL spacer and adk samples, Australasian haplotypes were more closely related to Northern Hemisphere haplotypes than to haplotypes found in the equatorial regions. In contrast, the phy2 sample showed that the north and south temperate regions were genetically divergent, with the equatorial regions intermediate. Maximum-likelihood estimates (MLE) of the rates of migration between the two hemispheres were significantly different for the two nuclear genes. The frequency spectra of mutations indicated that differences in implied population structure among the three loci resulted from directional selection on the chloroplast genome and on the chromosomal segment containing adk. Collectively, these data suggest that long-distance migration within the Northern Hemisphere and Australasian regions is common (relative to the mutation rate) and that migration between these two regions, potentially via equatorial populations, is more frequent than migration among equatorial populations.

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Molecular divergence patterns and infrageneric relationship of Monoclea (Monocleales, Hepaticae). Studies in austral temperate rain forest bryophytes

Cited by 28 publications

References 0 publications

Illuminating the evolutionary history of liverworts (Marchantiophyta)—towards a natural classification

Illuminating the evolutionary history of liverworts (Marchantiophyta)—towards a natural classification

Molecular relationship ofHymenophytonspecies (Metzgeriidae, Hepaticophytina) in New Zealand and Tasmania. Studies in austral temperate rain forest bryophytes 5

Selective sweeps and intercontinental migration in the cosmopolitan moss Ceratodon purpureus (Hedw.) Brid.

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